Lighting fixtures

Abstract

The objective of this disclosure is to increase the light-emitting area while enabling wireless communication. [Solution] The lighting fixture comprises a plurality of LED modules 3, a support member for supporting each LED module 3, and a wireless communication device for receiving wireless signals using electromagnetic waves as a medium. Each LED module 3 has a flat substrate 31 and a plurality of LEDs 30 mounted on the surface of the substrate 31. The support member is provided with a first through-hole at a position opposite to the antenna. One substrate 31 has a second through-hole 310 provided at a position opposite to the first through-hole. The second through-hole 310 is provided on the surface of the substrate 31 at a position sandwiched between two adjacent rows of the plurality of LEDs 30 mounted in multiple rows. The wireless communication device is positioned on the second surface of the support member so as to electromagnetically expose the antenna through the first through-hole and the second through-hole 310.

Description

Technical Field

[0001] The present disclosure relates to a lighting fixture, and more particularly to a lighting fixture capable of wireless communication using electromagnetic waves as a medium.

Background Art

[0002] As a conventional example, the lighting device described in Patent Document 1 is exemplified. The lighting device described in Patent Document 1 (hereinafter referred to as the conventional example) includes a fixture body attached to a ceiling or the like, and a light-emitting unit attached to the fixture body. The light-emitting unit includes a light-emitting element substrate on which a plurality of light-emitting elements are mounted, a light-emitting element support member that supports the light-emitting element substrate, a power supply unit, a translucent cover, and a wireless module.

[0003] The wireless module has an antenna, a wireless control circuit that controls the power supply unit according to a signal received by the antenna, and a housing that houses the antenna and the wireless control circuit inside. The housing is formed in an L shape in a side view and is attached to the upper surface of the light-emitting element support member. An opening is provided in the light-emitting element support member, and a part of the housing (guide portion) protrudes from the lower surface of the light-emitting element support member through the opening. Note that an antenna is housed in the guide portion of the housing.

[0004] That is, the wireless module can receive radio waves of a wireless signal with an antenna that protrudes from the lower surface of the light-emitting element support member without being blocked by the metal light-emitting element support member. The opening of the light-emitting element support member is provided at a position that does not overlap with the light-emitting element substrate when viewed from the thickness direction (vertical direction) of the light-emitting element support member.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] Incidentally, in conventional lighting devices (lighting fixtures), the opening through which the guide portion of the housing containing the antenna is inserted is provided in the light-emitting element support member so as to avoid the light-emitting element substrate. As a result, it has been difficult to increase the light-emitting area (the area of ​​the surface on which the light-emitting elements of the light-emitting element substrate are mounted).

[0007] The purpose of this disclosure is to provide a lighting fixture that can increase the light-emitting area while enabling wireless communication. [Means for solving the problem]

[0008] A lighting fixture according to one aspect of the present disclosure comprises a plurality of light source modules, a support member for supporting the plurality of light source modules, and a wireless communication device for receiving wireless signals using electromagnetic waves as a medium. Each of the plurality of light source modules has a flat substrate and a plurality of light-emitting elements mounted on the surface of the substrate. The wireless communication device has an antenna for receiving the wireless signals using radio waves as a medium. The plurality of light source modules are attached to a first surface of the support member, and the wireless communication device is arranged on a second surface opposite to the first surface. The support member is provided with a first through-hole at a position facing the antenna. The substrate of one of the plurality of light source modules has a second through-hole provided at a position facing the first through-hole. The second through-hole is provided on the surface of the substrate of the one light source module, at a position sandwiched between two adjacent rows of the plurality of light-emitting elements mounted in a plurality of rows. The wireless communication device is arranged on the second surface of the support member such that the antenna is electromagnetically exposed through the first and second through-holes. [Effects of the Invention]

[0009] The lighting fixtures disclosed herein have the effect of enabling wireless communication while increasing the light-emitting area. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a perspective view of a lighting fixture according to an embodiment of this disclosure, viewed from diagonally above. [Figure 2] Figure 2 is an exploded perspective view of the same object. [Figure 3] Figure 3 is a perspective view of the same object, taken from diagonally below. [Figure 4] Figure 4 is a bottom view of the same light source unit with the panel omitted. [Figure 5] Figure 5 is a top view of the light source unit in the same location. [Figure 6] Figure 6 is a bottom view of the LED module shown above. [Figure 7] Figure 7 is an exploded perspective view of the wireless communication device shown above. [Figure 8] Figure 8 is a cross-sectional view of the main part of the lighting fixture shown above. [Figure 9] Figure 9 is a bottom view of the main part of the light source unit shown above. [Figure 10] Figure 10 is a cross-sectional view of the main part of the light source unit in Modification 1 of the same lighting fixture. [Figure 11] Figure 11 is a cross-sectional view of the main part of the light source unit in a modified example 2 of the same lighting fixture. [Modes for carrying out the invention]

[0011] A lighting fixture according to an embodiment of this disclosure will be described in detail with reference to the drawings. However, the figures described in the embodiments below are schematic diagrams, and the ratios of the size and thickness of each component do not necessarily reflect the actual dimensional ratios. The configuration described in the following embodiments is merely one example of this disclosure. This disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of this disclosure can be achieved.

[0012] (1) Overview of the lighting fixture according to the embodiment The lighting fixture A1 according to the embodiment includes one or more light source modules (LED module 3), a support member 4, a power supply device 60, and a wireless communication device 7. The support member 4 supports the LED module 3. The power supply device 60 supplies power to the LED module 3 to cause it to light up. The wireless communication device 7 receives a wireless signal using electromagnetic waves as a medium.

[0013] The LED module 3 has a substrate 31 and a plurality of light emitting elements (LED 30) mounted on the surface of the substrate 31. The power supply device 60 is configured to adjust the power supplied to the LED module 3 according to the wireless signal received by the wireless communication device 7.

[0014] The wireless communication device 7 has an antenna 73 for receiving a wireless signal using radio waves as a medium. The support member 4 has a mounting plate (bottom plate 400) on which the LED module 3 is attached to the first surface and the wireless communication device 7 is disposed on the second surface opposite to the first surface. The bottom plate 400 is provided with a first through hole 402 at a position facing the antenna 73. The substrate 31 is provided with a second through hole 310 at a position facing the first through hole 402. The wireless communication device 7 is disposed on the second surface of the bottom plate 400 so as to electromagnetically expose the antenna 73 through the first through hole 402 and the second through hole 310.

[0015] Thus, the lighting fixture A1 according to the embodiment can arrange the wireless communication device 7 at a position where the antenna 73 and the substrate 31 of the LED module 3 overlap when viewed in the thickness direction of the mounting plate (bottom plate 400). As a result, the lighting fixture A1 according to the embodiment can enlarge the substrate 31 compared to the conventional example, so that it is possible to expand the light emitting area (the area of the surface of the substrate 31 on which the LED 30 is mounted) while enabling wireless communication.

[0016] (2) Details of the lighting fixture according to the embodiment The lighting fixture A1 according to the embodiment (hereinafter abbreviated as the lighting fixture A1) includes an instrument body 1 and a light source unit 2 (see FIGS. 1-3). The lighting fixture A1 is installed, for example, by embedding the instrument body 1 in a recess provided in a ceiling material inside a building. In the following description, unless otherwise specified, the up-down, left-right, and front-back directions indicated by arrows in FIG. 2 are defined as the up-down, left-right, and front-back directions of the lighting fixture A1, respectively.

[0017] (2-1) Instrument body The instrument body 1 is formed in a box shape having a square opening on the lower surface by coupling a cylindrical body 10 formed in a rectangular tube shape and a top plate 11 formed in a rectangular flat plate shape (see FIG. 2). The top plate 11 is formed such that the length in the left-right direction is shorter than the length in the left-right direction of the cylindrical body 10. Therefore, a rectangular window hole 12 is opened at the left end on the upper surface of the instrument body 1 (see FIGS. 1 and 2).

[0018] The cylindrical body 10 has a pair of first side walls 101 facing each other in the left-right direction and a pair of second side walls 102 facing each other in the front-back direction. The pair of first side walls 101 and the pair of second side walls 102 are each formed in a long rectangular shape. However, stepped portions 104 extending over the entire length in the front-back direction are formed at the upper end portions of the pair of second side walls 102. In addition, three holes are provided at equal intervals in the left-right direction in the stepped portion 104 of each second side wall 102. In the following description, the edges of each hole in the stepped portion 104 of each second side wall 102 are referred to as holding portions 103.

[0019] The pair of first side walls 101 and the pair of second side walls 102 are each formed of a metal plate. Then, the cylindrical body 10 is formed by joining both ends in the longitudinal direction (front end and rear end) of the pair of first side walls 101 and both ends in the longitudinal direction (left end and right end) of the pair of second side walls 102 by an appropriate method such as welding.

[0020] The top plate 11 is formed from a metal plate into a rectangular, flat shape. A power terminal block 13 and a signal terminal 14 are attached to the underside of the top plate 11 (see Figure 2). In addition, two cable insertion holes 110 are provided spaced apart in the center of the top plate 11 through which a power supply cable is inserted. Furthermore, at the left end of the top plate 11, multiple bolt insertion holes 111 are provided spaced apart in the front-to-back direction, through which suspension bolts embedded in the ceiling structure of the building can be inserted.

[0021] The fixture body 1 is inserted into a recessed hole in the ceiling material and fixed to multiple suspension bolts by tightening nuts onto suspension bolts that are inserted into bolt insertion holes 111 in the top plate 11, thereby embedding it in the ceiling.

[0022] (2-2) Light source unit The light source unit 2 includes multiple (five in the illustrated example) LED modules 3, a support member 4, four mounting springs 5, a power supply unit 6, and the like (see Figures 1-5).

[0023] (2-2-1) LED module The LED module 3 has multiple LEDs 30, a rectangular substrate 31, and two terminal fittings 32 (see Figure 6). The multiple LEDs 30 are, for example, package-type white LEDs for illumination. The substrate 31 is formed in the shape of a rectangular flat plate. The multiple LEDs 30 are mounted on the lower surface (first surface) of the substrate 31, arranged at equal intervals along the longitudinal direction of the substrate 31 and in four rows along the short direction of the substrate 31 (see Figure 6).

[0024] The two terminal fittings 32 are mounted near the first longitudinal end 31A on the underside of the substrate 31. The two terminal fittings 32 are the positive terminal fitting 32A and the negative terminal fitting 32B.

[0025] Furthermore, a conductor 33 for electrically connecting the multiple LEDs 30 and the two terminal fittings 32 is formed on the lower surface of the substrate 31 (see Figure 6). The conductor 33 is formed to reciprocate from the first end 31A to the second end 31B in the longitudinal direction of the substrate 31. However, although the conductor 33 is represented by a thin straight line in Figure 6, the shape and size of the conductor 33 are not limited to the shape and size shown.

[0026] The substrate 31 has a plurality of (three in the illustrated example) screw insertion holes 311, one second through hole 310, and a plurality of (two in the illustrated example) positioning holes 312 in the center of its short side. Each screw insertion hole 311 is a hole through which a screw for fastening the substrate 31 is inserted. Each positioning hole 312 is a hole through which a positioning projection provided on the bottom plate 400, which will be described later, is inserted. These three screw insertion holes 311 and two positioning holes 312 are arranged in a row with spacing along the longitudinal direction of the substrate 31. Each screw insertion hole 311 is formed in an oval shape with the longitudinal direction of the substrate 31 as its major axis.

[0027] The second through-hole 310 is located in the longitudinal direction of the substrate 31, closer to the first end 31A than to the second end 31B. The second through-hole 310 is formed in an oval shape with the longitudinal direction of the substrate 31 as its major axis (see Figure 6).

[0028] (2-2-2) Power supply unit The power supply unit 6 includes a power supply device 60, a wireless communication device 7, and a support plate 62 that supports the power supply device 60 and the wireless communication device 7 (see Figure 5).

[0029] (2-2-2-1) Power supply device The power supply unit 60 comprises a power supply circuit formed by mounting electronic components on a printed circuit board, and a first case 600 that houses the power supply circuit. The power supply circuit is configured to convert AC power supplied from the commercial power grid via a power cable connected to a power terminal block 13 into DC power and supply it to the LED module 3. As shown in Figure 5, the first case 600 is formed in the shape of a long box from a metal plate.

[0030] (2-2-2-2) Wireless communication devices As shown in Figures 5, 7, and 8, the wireless communication device 7 includes a circuit block 70, a second case 71, a signal cable 700, and the like. The circuit block 70 has a circuit board 72. The circuit board 72 is formed in a T-shape (see Figure 7). In the circuit board 72, the surface of the part corresponding to the vertical bar of the T is called the first region 721, and the surface of the part corresponding to the horizontal bar of the T is called the second region 722 (see Figure 7). An antenna 73 consisting of a microstrip antenna (also called a patch antenna) is formed in the first region 721. The antenna 73 is configured to receive wireless signals using, for example, radio waves in the 920 MHz band as a medium.

[0031] The second region 722 contains a signal processing circuit that acquires control information from the wireless signal received by the antenna 73 and transmits a control signal containing the acquired control information to the power supply unit 60 via the signal cable 700. The control information includes information for causing the power supply unit 60 to turn on or off (light up or turn off the LED module 3) and to increase or decrease the output of the power supply unit 60 (dimming the LED module 3).

[0032] Furthermore, a photodetector 74 that receives infrared signals using infrared light as a medium is mounted in the second region 722 (see Figure 7). The signal processing circuit acquires setting information from the infrared signal received by the photodetector 74 and performs setting processing based on the acquired setting information. The setting information includes, for example, commands for initializing unique identification information assigned to multiple lighting fixtures A1. When the signal processing circuit receives setting information (initialization commands), it initializes the identification information and other data stored in the built-in memory of the microcontroller that constitutes the signal processing circuit.

[0033] The second case 71, as shown in Figure 7, comprises a body 710 and a cover 711. The body 710 is made of a box-shaped synthetic resin molded body with one side (bottom) open. The body 710 has two side walls that face each other in the short direction, and one of these side walls has a through groove 7100 through which a signal cable 700 is inserted. The body 710 also has two female screw portions 7101. Furthermore, the body 710 has two side walls that face each other in the longitudinal direction, and each has a pair of hook holes 7102 arranged in the short direction.

[0034] The cover 711 comprises a roughly rectangular plate-shaped lid 7110, two pairs of fixing legs 7111, and an antenna housing section 7112. The fixing legs 7111 are formed to protrude upward from both ends along the shorter side of the lid 7110. The tips (upper ends) of these two pairs of fixing legs 7111 are provided with outwardly protruding hooking claws 7113. The antenna housing section 7112 is roughly flattened rectangular box-shaped and is integrally formed with the lid 7110, protruding downward from the lower surface of the lid 7110 and opening on the upper surface of the lid 7110. Furthermore, a through hole 7114 is provided at the longitudinal end of the antenna housing section 7112, penetrating through the lid 7110 in the thickness direction (vertical direction).

[0035] The body 710 and the cover 711 are joined by the two pairs of fixing legs 7111 of the cover 711, which are hooked one by one into the four hooking holes 7102 of the body 710. In the circuit block 70, the second region 722 of the circuit board 72 is housed inside the body 710, and the first region 721 (antenna 73) of the circuit board 72 is housed in the antenna housing 7112 (see Figure 8). The through hole 7114 of the cover 711 faces the light-receiving portion 740 of the light-receiving element 74 mounted on the second region 722 of the circuit board 72. In other words, the infrared signal transmitted from the setting device (not shown) is received (received) by the light-receiving element 74 through the through hole 7114 of the second case 71 (cover 711).

[0036] (2-2-2-3) Support plate The support plate 62 is formed from a metal plate into a hook-shaped flat plate (see Figure 5). However, several side pieces of the support plate 62 are bent up. The power supply unit 60 and the wireless communication device 7 are mounted on the upper surface of the support plate 62 (see Figure 5).

[0037] Here, an oval-shaped third through-hole 620 is provided in the support plate 62 at the position where the wireless communication device 7 is to be mounted (see Figure 8). In other words, the wireless communication device 7 is mounted to the support plate 62 with the antenna housing section 7112 of the second case 71 inserted through the third through-hole 620 (see Figure 8).

[0038] (2-2-3) Support Member The support member 4 includes a housing 40, a frame 41, and two connecting plates 42 (see Figures 2, 3, and 5).

[0039] The housing 40 has a square, flat bottom plate 400 and four wall plates that rise downward from the four edges of the bottom plate 400, forming a square box shape with an open bottom (see Figures 1 and 3). Five LED modules 3 are screwed to the bottom surface of the bottom plate 400 so that they are arranged in a line along the shorter side (see Figures 3 and 4). A support plate 62 is screwed to the top surface of the bottom plate 400 (see Figure 5).

[0040] Here, a rectangular first through-hole 402 is provided in the thickness direction (vertical direction) of the base plate 400, opposite to the third through-hole 620 provided in the support plate 62. In other words, when the support plate 62 is attached to the upper surface of the base plate 400, the antenna housing portion 7112, which is inserted through the third through-hole 620 of the support plate 62, is inserted through the first through-hole 402 and protrudes downward from the lower surface of the base plate 400 (see Figure 8).

[0041] The frame 41 has a frame plate 410 formed in the shape of a square frame, and four side plates 411 that rise upward from the inner edge of the upper surface of the frame plate 410. The frame 41 houses the housing 40 inside the four side plates 411. At this time, the panel 43 is sandwiched between the upper surface of the frame 41 and the lower ends of the four wall plates of the housing 40. The housing 40 and the frame 41 are then integrally connected by screwing connecting plates 42 to the center in the left-right direction of the side plates 411 on both the front and rear sides of the frame 41 (see Figures 2 and 5). Each connecting plate 42 is made by bending a rectangular metal plate into an L-shape along its longitudinal direction.

[0042] Panel 43 is formed in the shape of a square flat plate from a translucent synthetic resin, such as acrylic resin or polycarbonate resin mixed with a diffusing material (see Figures 2 and 3). In other words, the light (illumination light) emitted from the five LED modules 3 attached to the bottom surface of the housing 40 (the underside of the bottom plate 400) is diffused as it passes through panel 43 and irradiates the illuminated space.

[0043] Here, the two front and rear side plates 411 of the frame 41 are each provided with two hooks 44 to which the mounting springs 5, described later, are attached (see Figure 2).

[0044] (2-2-5) Mounting spring The mounting spring 5 has a coil portion 50, a pair of arm portions 51, and a mounting portion 52 (see Figure 2). The coil portion 50, the pair of arm portions 51, and the mounting portion 52 are integrally formed from metal wire.

[0045] The mounting spring 5 is attached to the support member 4 by hooking its mounting portion 52 onto a hook portion 44 provided on the support member 4 (see Figure 2). However, the two mounting springs 5 ​​attached to the front hook portion 44 of the support member 4 and the two mounting springs 5 ​​attached to the rear hook portion 44 of the support member 4 have slightly different shapes in their pair of arms 51.

[0046] (3) Installation procedure of lighting fixture according to the embodiment Next, we will explain the installation procedure for lighting fixture A1.

[0047] First, the worker inserts the fixture body 1 into the recessed hole in the ceiling material and inserts the suspension bolts through the bolt insertion holes 111 in the top plate 11. Then, the worker fastens nuts to the suspension bolts that are inserted through the bolt insertion holes 111 and protruding from below the top plate 11, thereby securing the fixture body 1 to multiple suspension bolts. Next, the worker connects the power cable pulled in through the cable insertion hole 110 in the top plate 11 to the power terminal block 13, and connects the signal line, also pulled in through the cable insertion hole 110, to the signal terminal block 14.

[0048] Next, the worker suspends the light source unit 2 from the fixture body 1 using the two mounting springs 5 ​​attached to the front of the support member 4. Specifically, the worker bends the pair of arms 51 of the two mounting springs 5 ​​toward each other and hooks the tip of each arm 51 onto one of the two holding parts 103 at the front of the fixture body 1. As a result, the light source unit 2 is suspended from the fixture body 1 by the fact that the arms 51 of the two mounting springs 5 ​​are hooked onto the holding parts 103 of the fixture body 1. This state is called the temporary suspension state.

[0049] In the temporary suspension state, the worker electrically connects the power terminal block 13 and the power supply unit 60 with power lines. After completing the wiring work, the worker hooks the tips of the pair of arms 51 of the two mounting springs 5 ​​attached to the rear of the support member 4 onto the two holding parts 103 at the rear of the fixture body 1. At this time, the light source unit 2 is suspended from the fixture body 1 by the four mounting springs 5, almost parallel to the ceiling material.

[0050] The worker then pushes the light source unit 2 upward and inserts it into the fixture body 1 through the opening on the bottom surface of the fixture body 1. At this time, as the light source unit 2 moves upward, the four mounting springs 5 ​​spread outwards due to the elastic force of the coil portion 50, causing each arm portion 51 to move away from the others. When the worker pushes the light source unit 2 up to the point where the frame plate 410 of the light source unit 2 touches the ceiling material, the four mounting springs 5 ​​are held by the four holding portions 103 of the fixture body 1, and the light source unit 2 can be attached to the fixture body 1 (see Figure 1).

[0051] The installation work for lighting fixture A1 is thus completed.

[0052] (4) Characteristics of the lighting fixture according to the embodiment In lighting fixture A1, the antenna 73 of the wireless communication device 7 (antenna housing 7112 of the second case 71) is inserted through the third through hole 620 of the support plate 62, the first through hole 402 of the bottom plate 400, and the second through hole 310 of the substrate 31. The tip portion (lower end portion) of the antenna 73 protrudes downward from the bottom surface of the substrate 31 through the second through hole 310 of the substrate 31 (see Figure 8). In other words, the wireless communication device 7 is positioned on the upper surface of the bottom plate 400 such that the antenna 73 is electromagnetically exposed through the first through hole 402 and the second through hole 310. Therefore, the wireless signal (radio wave) transmitted from the transmitter is received by the antenna 73 after passing through the panel 43 made of an insulator (synthetic resin). Note that "electromagnetically exposed" means in a state where electromagnetic waves, including radio waves, can be received.

[0053] In the conventional example described in Patent Document 1, the opening through which the guide portion of the housing containing the antenna is inserted is provided in the light-emitting element support member so as to avoid the light-emitting element substrate. In contrast, in the lighting fixture A1, the first through-hole 402 through which the antenna 73 is inserted is provided in a position that overlaps with the substrate 31 of the LED module 3, and the antenna 73 is electromagnetically exposed through the second through-hole 310 provided in the substrate 31.

[0054] Therefore, since the lighting fixture A1 can overlap the second through-hole 310 provided in the base plate 400 with the substrate 31, the spacing between LED modules 3 can be narrowed compared to the case where the second through-hole is provided between the substrates 31 of adjacent LED modules 3. In other words, the lighting fixture A1 can enlarge the substrate 31 of the LED module 3 without changing the size of the base plate 400. As a result, the lighting fixture A1 can increase the light-emitting area (the area of ​​the lower surface of the substrate 31) while enabling wireless communication.

[0055] Furthermore, since the lighting fixture A1 has a portion (the tip) of the antenna 73 protruding from the lower surface of the substrate 31 through the second through-hole 310 of the substrate 31, the receiving sensitivity of the wireless communication device 7 can be improved.

[0056] Furthermore, the lighting fixture A1 has a first through-hole 402 in the metal base plate 400 that is no smaller than the second through-hole 310 in the substrate 31. That is, the first through-hole 402 and the second through-hole 310 are formed such that the length of the first through-hole 402 in the vertical and horizontal directions is greater than or equal to the length of the second through-hole 310 in the long axis and short axis directions, respectively (see Figure 9).

[0057] However, the larger the dimensions of the first through-hole 402, the greater the distance between the edge of the first through-hole 402 in the base plate 400 and the antenna 73, making it easier for radio waves passing through the substrate 31 to be received by the antenna 73 without being obstructed by the base plate 400. As a result, the lighting fixture A1 can further improve the reception sensitivity of the wireless communication device 7. The through-hole 7114 in the second case 71 of the wireless communication device 7 faces the first through-hole 402 in the base plate 400 and the second through-hole 310 in the substrate 31 (see Figure 9). In other words, the light-receiving part 740 of the light-receiving element 74 of the wireless communication device 7 is positioned to face the first through-hole 402 and the second through-hole 310, so that infrared signals are less likely to be obstructed by the substrate 31 and the base plate 400, thereby improving the reliability of infrared communication. However, in lighting fixture A1, the first through-hole 402 may be larger than the second through-hole 310, provided that the receiving sensitivity of the antenna 73 and the receiving sensitivity of the light-receiving element 74 are sufficiently ensured.

[0058] Furthermore, the second through-hole 310 is provided in a location on the surface of the substrate 31 where there are no LEDs 30 and conductors 33. For example, since there are multiple screw holes 311 in the center of the substrate 31 in the short direction for screwing the substrate 31 to the base plate 400, there are no LEDs 30 and conductors 33 in that location. Therefore, by providing the second through-hole 310 in the center of the substrate 31 in the short direction, the lighting fixture A1 can effectively utilize the dead space of the substrate 31 that occurs between the multiple screw holes 311. However, the location where the second through-hole 310 is provided is not limited to the center of the substrate 31 in the short direction. For example, the second through-hole 310 may be provided between the first and second rows or the third and fourth rows of LEDs 30 arranged in four rows along the short direction of the substrate 31.

[0059] Furthermore, the second through-hole 310 is located in the longitudinal direction of the substrate 31, closer to the first end 31A than to the second end 31B (see Figure 6). That is, the substrate 31 is screwed to the bottom plate 400 in a orientation that brings the first end 31A, on which the two terminal fittings 32 are mounted, closer to the power supply 60. Therefore, if the second through-hole 310 is located closer to the first end 31A than to the second end 31B, the wireless communication device 7 can be positioned closer to the power supply 60. As a result, the length of the signal cable 700 of the wireless communication device 7 can be shortened.

[0060] The lighting fixture A1 comprises a light source unit 2 having an LED module 3, a support member 4, a power supply 60, and a wireless communication device 7, and a fixture body 1 to which the light source unit 2 is detachably attached. Therefore, since the lighting fixture A1 can be attached to the fixture body 1 first, and then the light source unit 2 can be attached to the fixture body 1, the workability when attaching it to the ceiling material can be improved.

[0061] (5) Modified example of a lighting fixture according to the embodiment Next, several modifications of the lighting fixture according to the embodiment will be described. However, each of the modifications described below is characterized by the wireless communication device 7. Therefore, in each modification, components common to the embodiment are denoted by the same reference numerals, and their description and illustration are omitted as appropriate.

[0062] (5-1) Variation 1 As shown in Figure 10, the wireless communication device 7 in the lighting fixture A1 of Modified Example 1 has two circuit boards 72A and 72B. One circuit board 72A has an antenna 73 formed in the first region 721 of the circuit board 72 in the embodiment. The other circuit board 72B has a signal processing circuit and the like formed in the second region 722 of the circuit board 72 in the embodiment. The two circuit boards 72A and 72B are electrically connected by a wiring 723 consisting of two lead wires.

[0063] Furthermore, in the wireless communication device 7 of the modified example 1, the second case 71 has a main body 712 that houses the circuit board 72B, an antenna housing 713 that houses the circuit board 72A, and a wiring housing 714 that houses the wiring 723.

[0064] The main body 712 and the antenna housing 713 are each formed in the shape of a rectangular parallelepiped, with a height lower than its length and width. The wiring housing 714 is formed in the shape of a cylinder. The main body 712 is connected to one end (upper end) of the wiring housing 714 in the axial direction (up and down direction), and the antenna housing 713 is connected to the other end (lower end) of the wiring housing 714 in the axial direction (see Figure 10).

[0065] The main body 712 is attached to the upper surface of the support plate 62. The wiring housing 714 is inserted through the third through hole 620 of the support plate 62, the first through hole 402 of the bottom plate 400, and the second through hole 310 of the circuit board 31. The antenna housing 713 is positioned below the circuit board 31 (see Figure 10).

[0066] However, in Modification 1, the wireless communication device 7 exposes the entire antenna housing 713 containing the antenna 73 beneath the substrate 31, thus further improving the radio wave reception sensitivity. Moreover, in Modification 1, the lighting fixture A1 has the circuit board 72A on which the antenna 73 is formed laid horizontally, thus reducing the height to which the antenna 73 protrudes beneath the substrate 31, making it less likely for the light emitted from the LED 30 to be obstructed.

[0067] (5-2) Modification 2 As shown in Figure 11, the wireless communication device 7 in the lighting fixture A1 of Modified Example 2 is characterized in that the two circuit boards 72A and 72B of the wireless communication device 7 in Modified Example 1 are housed in the main body 712, and the antenna housing section 713 and wiring housing section 714 are eliminated.

[0068] The two circuit boards 72A and 72B are housed in the main body 712 with circuit board 72A, on which the antenna 73 is formed, at the bottom, and circuit board 72B, on which the signal processing circuit and the like are formed, at the top. The two circuit boards 72A and 72B are electrically connected by wiring 723.

[0069] The second case 71, which consists only of the main body 712, is attached to the upper surface of the support plate 62 such that the antenna 73 (circuit board 72A) faces the third through hole 620, the first through hole 402, and the second through hole 310 (see Figure 11).

[0070] However, in the modified example 2, the wireless communication device 7 has an antenna 73 housed in a synthetic resin body 712, which is electromagnetically exposed beneath the substrate 31 through a third through-hole 620, a first through-hole 402, and a second through-hole 310. In other words, the wireless signal (radio wave) transmitted from the transmitter passes through the second through-hole 310 in the substrate 31, the first through-hole 402 in the bottom plate 400, and the third through-hole 620 in the support plate 62 and is received by the antenna 73.

[0071] In the modified example 2, the lighting fixture A1 does not have the antenna 73 protruding below the circuit board 31, making it even less likely for the light emitted from the LED 30 to be obstructed.

[0072] (6) Summary A lighting fixture (A1) according to a first aspect of this disclosure comprises one or more light source modules (LED modules 3), a support member (4) for supporting the light source modules, and a power supply device (60) for supplying power to the light source modules to light them up. The lighting fixture (A1) according to the first aspect comprises a wireless communication device (7) for receiving wireless signals using electromagnetic waves as a medium. The light source module has a substrate (31) and a plurality of light-emitting elements (LEDs 30) mounted on the surface of the substrate (31). The power supply device (60) is configured to adjust the power supplied to the light source modules according to the wireless signals received by the wireless communication device (7). The wireless communication device (7) has an antenna (73) for receiving wireless signals using radio waves as a medium. The support member (4) has a mounting plate (bottom plate 400) on which the light source modules are attached to a first surface and on which the wireless communication device (7) is positioned on a second surface opposite to the first surface. The mounting plate is provided with a first through hole (402) at a position opposite to the antenna (73). The substrate (31) has a second through-hole (310) positioned opposite the first through-hole (402). The wireless communication device (7) is positioned on the second surface of the mounting plate such that the antenna (73) is electromagnetically exposed through the first through-hole (402) and the second through-hole (310).

[0073] In the first embodiment of the lighting fixture (A1), the first through-hole (402) can be overlapped with the substrate (31), so that the substrate (31) of the light source module can be made larger without changing the size of the mounting plate, compared to when the first through-hole is not overlapped with the substrate (31). As a result, the lighting fixture (A1) in the first embodiment can increase the light-emitting area (surface area of ​​the substrate 31) while enabling wireless communication.

[0074] A lighting fixture (A1) according to a second aspect of this disclosure can be realized by combining it with the first aspect. In the lighting fixture (A1) according to the second aspect, it is preferable that at least a portion of the antenna (73) of the wireless communication device (7) is inserted through the first through hole (402) and the second through hole (310).

[0075] The lighting fixture (A1) according to the second embodiment can improve the receiving sensitivity of the wireless communication device (7) by inserting at least a portion of the antenna (73) through the first through hole (402) and the second through hole (310).

[0076] A lighting fixture (A1) according to a third aspect of this disclosure can be realized by combining it with the second aspect. In the lighting fixture (A1) according to the third aspect, it is preferable that at least a portion of the antenna (73) protrudes from the surface of the substrate (31) through the second through hole (310).

[0077] The lighting fixture (A1) according to the third embodiment can further improve the receiving sensitivity of the wireless communication device (7) by allowing at least a portion of the antenna (73) to protrude from the surface of the substrate (31) through the second through hole (310).

[0078] A lighting fixture (A1) according to a fourth aspect of this disclosure can be realized by combination with any of the first to third aspects. In the lighting fixture (A1) according to the fourth aspect, the mounting plate is preferably made of a metal material. The first through hole (402) is preferably not smaller than the second through hole (310).

[0079] In the lighting fixture (A1) according to the fourth embodiment, the distance between the edge of the first through hole (402) and the antenna (73) is increased, making it easier for radio waves passing through the substrate (31) to be received by the antenna (73) without being obstructed by the mounting plate. As a result, the lighting fixture (A1) according to the fourth embodiment can further improve the reception sensitivity of the wireless communication device (7).

[0080] A lighting fixture (A1) according to a fifth aspect of this disclosure can be realized by combining it with a fourth aspect. In the lighting fixture (A1) according to the fifth aspect, the first through hole (402) is preferably larger than the second through hole (310).

[0081] The lighting fixture (A1) according to the fifth embodiment can further improve the receiving sensitivity of the wireless communication device (7).

[0082] A lighting fixture (A1) according to the sixth aspect of this disclosure can be realized by combination with any of the first to fifth aspects. In the lighting fixture (A1) according to the sixth aspect, the wireless communication device (7) preferably has an infrared light receiving unit (light receiving element 74) for receiving wireless signals using infrared light as a medium. The infrared light receiving unit is preferably arranged to face the first through hole (402) of the mounting plate and the second through hole (310) of the substrate (31).

[0083] In the sixth embodiment of the lighting fixture (A1), the infrared light receiving unit is positioned so as to face the first through hole (402) of the mounting plate and the second through hole (310) of the substrate (31), thereby making it less likely for infrared-mediated wireless signals to be blocked by the substrate (31) and the mounting plate. As a result, the lighting fixture (A1) in the sixth embodiment can improve the reliability of infrared-mediated wireless communication.

[0084] A lighting fixture (A1) according to the seventh aspect of this disclosure can be realized in combination with any of the first to sixth aspects. In the lighting fixture (A1) according to the seventh aspect, the plurality of light-emitting elements are preferably electrically connected via wiring conductors (33) formed on the surface of the substrate (31). The second through hole (310) is preferably provided on the surface of the substrate (31) in a location where the plurality of light-emitting elements and conductors (33) are not present.

[0085] In the seventh embodiment of the lighting fixture (A1), a second through-hole is provided on the surface of the substrate (31) in a position where there are no multiple light-emitting elements and conductors (33), so that the dead space of the substrate (31) can be effectively utilized.

[0086] An illuminator (A1) according to the eighth aspect of this disclosure can be realized by combining it with the seventh aspect. In the illuminator (A1) according to the eighth aspect, the substrate (31) is preferably formed in the shape of a long, flat plate. The plurality of light-emitting elements are preferably mounted on the surface of the substrate (31) at intervals along the longitudinal direction of the substrate (31). The conductor (33) is preferably formed to reciprocate from the first end (31A) in the longitudinal direction of the substrate (31) to the second end (31B) in the longitudinal direction. The second through hole (310) is preferably located in the longitudinal direction of the substrate (31) closer to the first end (31A) than to the second end (31B).

[0087] In the lighting fixture (A1) according to the eighth embodiment, if the second through hole (310) is located closer to the first end (31A) than to the second end (31B), for example, the wireless communication device (7) can be placed closer to the power supply device (60). As a result, the lighting fixture (A1) according to the eighth embodiment can shorten the length of the wiring (signal cable 700) for connecting the wireless communication device (7) and the power supply device (60).

[0088] A lighting fixture (A1) according to the ninth aspect of this disclosure can be realized in combination with any of the first to eighth aspects. Preferably, the lighting fixture (A1) according to the ninth aspect comprises a light source unit (2) having a light source module, a support member (4), a power supply (60), and a wireless communication device (7), and a fixture body (1) to which the light source unit (2) is detachably attached.

[0089] In the ninth embodiment, the lighting fixture (A1) has a light source unit (2) that is detachably attached to the fixture body (1), which improves workability when it is attached to building materials such as ceiling materials. [Explanation of Symbols]

[0090] A1 Lighting fixtures 1. Main body of the device 2 Light source units 3 LED modules (light sources) 4. Support members 7 Wireless communication device 30 LEDs (light-emitting elements) 31 circuit boards 60 Power supply 73 Antenna 74. Light-receiving element (infrared light-receiving section) 310 Second through hole 311 Screw insertion hole 400 Base plate (mounting plate) 402 First through hole

Claims

1. Multiple light source modules, A support member that supports the plurality of light source modules, A wireless communication device that receives wireless signals using electromagnetic waves as a medium, Equipped with, Each of the aforementioned multiple light source modules comprises a substrate formed in the shape of a flat plate and a plurality of light-emitting elements mounted on the surface of the substrate. The wireless communication device has an antenna for receiving the wireless signal using radio waves as a medium. The support member has the plurality of light source modules attached to its first surface, and the wireless communication device arranged on its second surface opposite to the first surface. The support member is provided with a first through-hole at a position facing the antenna. The substrate of one of the plurality of light source modules has a second through hole located opposite the first through hole, The second through-hole is provided on the surface of the substrate of the one light source module, at a position sandwiched between two adjacent rows of the multiple light-emitting elements mounted in multiple rows, The wireless communication device is positioned on the second surface of the support member such that the antenna is electromagnetically exposed through the first through hole and the second through hole. Lighting fixtures.

2. The substrate is formed in the shape of a long, flat plate. The lighting fixture according to claim 1.

3. The substrate has a plurality of screw insertion holes through which screws for fastening the substrate to the support member are inserted. The lighting fixture according to claim 2.

4. The plurality of screw insertion holes are arranged in a line with the second through-hole along the longitudinal direction of the substrate. The lighting fixture according to claim 3.

5. The wireless communication device has at least a portion of the antenna inserted through the first through hole and the second through hole. A lighting fixture according to any one of claims 1 to 3.

6. At least a portion of the antenna protrudes from the surface of the substrate of the one light source module through the second through-hole. The lighting fixture according to claim 5.

7. The support member is made of a metal material, The first through hole is not smaller than the second through hole. A lighting fixture according to any one of claims 1 to 6.

8. The first through hole is larger than the second through hole. The lighting fixture according to claim 7.

9. The wireless communication device has an infrared light receiving unit for receiving the wireless signal using infrared light as a medium, The infrared light receiving unit is positioned to face the first through-hole of the support member and the second through-hole of the substrate of the one light source module. A lighting fixture according to any one of claims 1 to 8.

10. A light source unit having the plurality of light source modules, the support member, and the wireless communication device, The fixture body to which the light source unit is detachably attached, Equipped with, A lighting fixture according to any one of claims 1 to 9.

11. The aforementioned light source unit further includes a power supply device that supplies power to the light source module to light it up. The power supply device is configured to adjust the power supplied to the light source module in accordance with the wireless signal received by the wireless communication device. The lighting fixture according to claim 10.

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